Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to:

Question:
Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to:

[A].

1.45

[B].

1.88

[C].

2.9

[D].

3.7

Answer: Option C

Explanation:

xz = y2       10(0.48z) = 10(2 x 0.70) = 101.40

0.48z = 1.40

z =	140	=	35	= 2.9 (approx.)
	48		12